Working description
The oil fl ow necessary to drive the blower, is taken from the tractor
distributor, through a pressure tube to a three-way regulator. The
rotational speed of the oleo-dynamic motor, and therefore that
of the blower, is proportional to the fl ow pressure shown on the
manometer (Table 4). The system is equipped with a safety valve
that allows the blower to continue turning by inertia even after the
system has been disengaged or when there has been a sudden
failure of the system.
The return circuit, which can have a radiator incorporated (on re-
quest), must be low pressure (max 10 bar) otherwise the oil-seal
of the oleo-dynamic motor will be damaged. We recommend that
a 3/4 inch return pipe is connected to the tractor's oleo-dynamic
system scavenge union in the following way:
a) The return oil must pass through the fi lter;
b) The return oil must not pass through the distributors but
through a low-pressure return circuit (scavenge).
For further information contact the manufacturer of the trac-
tor.
Starting up
With the engine off and the tractor immobilized, connect correctly all
the quick-couplings. Start the engine and operate the system at idle
for a few minutes bringing constant pressure to the entire circuit in
order to avoid instability of the blower. It is possible to regulate the
pressure only when the oil has reached the right temperature and
the blower does not present changes of speed. If the equipment
is used with more than one tractor and, consequently, different
distributors and oils, it will be necessary to repeat the calibration
procedure for each tractor.
In tractors with a variable fl ow rate pump (closed hydraulic circuit),
equipped with oil fl ow rate regulator, open the three-way regula-
tor completely (B Fig. 62) and, starting with a low oil fl ow rate,
gradually open the internal regulator of the tractor circuit until the
required pressure is reached as shown by the pressure gauge (C
Fig. 61).
Blower pump control:
Seed drills are delivered with pressure based on the machine width,
as according to Table 5.
Pressure
Blower
(bar)
(N giri)
80
90
120
140
B
A
fi g. 62
cod. G19503231
USE AND MAINTENANCE
Working
Pressure
width
required
mt. 2,5
mt. 3,0
mt. 4,0
mt. 5,0
mt. 6,0 - 9,0
C
If you wish to increase the number of revolutions of the fan for
distributing heavier seeds, carefully proceed as follows (Fig. 62):
In those cases where the power is taken from the rear power
take-off of a harrow or a miller, if possible disconnect the
moving parts of the knives. In any case, make sure that no
one is able to get near the rear apparatus.
a) loosen the handwheel (A Fig. 62);
b) rotate the handwheel (B Fig. 62) clockwise or anticlockwise to
reduce or increase pressure and adjust the number of revolu-
tions of the blower accordingly.
c) When the adjustment has been completed, tighten the lock nut
again.
It is strictly forbidden to touch act on the dowel (C Fig. 62) for
any reason, as this would unset the system and could lead to
the motor, the pump or the fan.
Remember furthermore that at the successive start-up of the sy-
stem, with cold oil and the position of the regulator untouched, there
will be an initial increase in the blower speed which, once the right
working temperature has been reached, will return to that set.
Oil cooling
When using a dependent system it is important to check the ca-
pacity of the tractor's oil tank and whether the cooling system is
suffi cient. If necessary have an oil cooler or a larger tank installed
on the tractor by the dealer: the ratio between the volume of oil
in the system and the capacity of the tank should be appro-
ximately 1:2.
ATTENTION
- Always keep oils and grease out of reach of children.
- Always read warnings and precautions indicated on the
containers carefully.
- Avoid skin-contact.
- After use wash the equipment thoroughly.
- Treat the used oils and polluting liquids in conformity with
the laws in force.
The Manufacturer declines all responsibility due to negligence
and non-observance of these rules.
ENGLISH
WARNING
WARNING
EN - 73
